Gene Simmons, controversial 1970s rocker known best for being the “rock 'n' roll all night” bassist for Detroit Rock City favorite Kiss, spent Tuesday night in Iowa — playing a headlining solo gig at the historic Surf Ballroom in Clear Lake.

Ahead of the show, it appears, he took a moment to post a photo on Twitter of the Clear Lake scenery — err — a shot of the venue’s urinal wall?

We have so many questions.

Why a wall of urinals? Were these good urinals? Bad urinals? Is he saying his visit to Iowa’s gone down the toilet?

The Surf’s caked in music history. Instagram-worthy nods to Buddy Holly and “The Day The Music Died” line the walls of the venue and rock ‘n’ roll museum. Maybe there’s a historical reference buried in the wall of toilets?

Fans joked and contemplated online about the post, leaving comments such as “rock ‘n’ roll holy ground right there,” “quite crude up here in the Midwest” and “come on Gene, respect the history.”

Iowa veteran Dustin Patrick, 38 from Altoona, center, who is receiving a home from the Military Warriors Support Foundation meets the band Kiss before they perform at the Iowa State Fair on Friday, August 19, 2016, in Des Moines. "It doesn't feel real," said Patrick.(Photo: Brian Powers/Staff photo)

It wasn’t all toilet humor at his stop, though. Simmons while on stage received an honorary lifetime membership to the 1st Iowa Infantry Association. In past Iowa stops, Simmons and his band mates have honored military members by via the Military Warriors Support Foundation.

Former Mason City Globe Gazette photographer Elwin Musser at the site of the Feb. 3, 1959 plane crash north of Clear Lake where he took his photos for the Mason City Globe Gazette. Rodney White/The Register